Description: Oblong white pill indexed with "M" placed in a square on one side and "1721" debossed on the other Active Ingredients: Acetaminophen / Propoxyphene napsylate Strength: 650mg / 100mg Manufacturer: Mallinckrodt Pharmaceuticals Available Brand Names: Darvocet-N 100

M 1721 pill is a generic version for name brand Darvocet-N 100 manufatured by Mallinckrodt Pharmaceuticals. Darvocet-N 100 is a compound pain reliever that consists of Acetaminophen (Paracetamol) combined with Propoxyphene napsylate.

Propoxyphene napsylate is a mild opioid pain reliever. Acetaminophen is an analgesic (a pain reliever) and an antipyretic (a fever reducer) which strengthens analgetic effects of Propoxyphene.

Each M 1721 pill contains 650 mg of Acetaminophen and 100 mg of Propoxyphene napsylate.

M 1721 pills are used to relieve mild to moderate pain.